Cooling coil



Feb. 5, 1929. 1,701,341

N. M. SMALL 7 COOLING COIL Filed Feb. 24, 1928 Fig-1- Patented Feb. 5, 1929.

UNITED STAT" s 1,101,341 PATENT OFFICE.

NORMAN M.

COOLING" COIL.

YApplication filed February 24, 1928. Serial No. 256,696.

My invention consists of an improved arrangement of apparatus for cooling purposes and more particularly for condensing ammonia gases or carbon dioxide or similar gases used in refrigerating plants.

.An object of theinvention is to provide a cooling system which will operateto condense and cool the refrigerating medium above mentioned with a degree of perfection impossible with apparatusnow in use,

Further objects'and advantages of the in- 1 is a side elevation of the apparainclusive indicate pipes through which a cool- As shown the pipes coning fluid passes.

form two 0011s for nected by return bends two streams of fluid.

The lower pipe 10 is provided with anin-.

let pipe at 20 and an outlet. at 21. The pipe 12 is provided with an inlet at 22 and an outlet at 23 for cooling fluid. The pipes 10-11, 12-13, 14-15, 16-17 and 18-19 are connected at their right end as shown in Fig. 1 with a U-tube or return bend 24.

The left ends of the pipes 13-14 and 15-16 are joined by a similar connection 25. The

left end of the pipe 11 isconnected by a pipe 26 with the end of the pipe 18. I The cooling ipes 10 to 19 are each surrounded by casing 01' shells 27 to 36. The

ends of these casings are soldered or otherwise secured to the cooling pipes at 37 to provide a fluid tight contact to prevent leakage of gas around the cooling pipes. The casings are interconnected by passages 38, 39, to provide a zig-zag course for the fluid passing through them. The casing 27 is provided with an inlet passage at 40 and the casing 36 has an outlet passage for the gas at 41. Supporting members 42 and 43 provide for properly holding the coils in position. 8

The operation of the device is as follows: The gas to be cooled or condensed enters the system of casings at 40and passes to the right end of the casing 27 to the passage 38, thence back through the casing 28 to the passage 39 and into the casing 29 etc. through the system to the casing 36 thence out through the .outlet passage 41. In passing through the system the gas passes around and over the cooling pipes 10 to 19.

The'course of the coolingfluid is .as follows; Cooling water'enters the pipe 10 at 20 and .passes to the right end of this pipe, thence through the return bend 24 to the pipe 11, thence through the vertical pipe 26 to the pipe 18 thence to the right through this pipe to the return bend 24 and back through the pipe 19 to theoutlet 21. Cooling fluid for the second stream enters at 22, passes through the pipe 12, return bend 24, pipe 13, return bend 25, pipe 14, return bend 24, pipe 15, return bend 25, pipe 16, return bend 24, and pipe 17 to the outlet 23. I

The gas, usually CO or ammonia, which enters at 40 is therefore first subjected to relatively cold water in the pipes 18 and 19 as the fluid which has passed through the pipes.

10 and '11 is still relatively cold. The gas therefore is cooled considerably before contacting with the pipes 17, 16, etc. When the gas reaches the cold water pipes 13 and 12 it is further cooled to almost the temperature of the cooling fluid. Upon passing over the last set of cooling pipes 10 and 11, filled with cold water, the gas is reduced to substantially the temperature of the water.

Since the water in these last named pipes was required to reduce the temperature of the gas but slightly it has had its own temperature only slightly raised and hence passes to the upper pipes 18 and 19 as cold water to cool these pipes with which the gas first contacts as before stated.

It will be obvious to those skilled in the art that various changes may be made in my device without departing from the spirit SMAL or WAYNESBORQ, PENNSYLVANIA, ASSIGNOR TO ERICK COM- PANY', or wAYNEsBoRo, PENNSYLVANIA, A CORPORATION.

of the invention, and I, therefore, do not limit myself to what is shown in the drawings and described in the specification, but only as set forthin the appended claims.

Havingthus -fully described my said invention, what I claim as new and desire to secure by Letters Patent, is: I v

1. In a cooler or condenser a circuitous chamber through which a gaseous medium is adapted to pass, means for subjecting the gas near the outlet of this chamber to a cooling fluid, means for subjecting the gas near the inlet of the chamber to a fluid of slightly higher temperature, and means for subjecting the gas intermediate the outlet and inlet of said system to a second cooling medium, substantially as set forth.

In a cooling apparatus, a system of piping for the medium to be cooled, means for subjecting the outlet of said system to a relatively cold fluid, means for conducting this cooling fluid to the inlet end. of the system, and means for subjecting the intermediate portions of the system to a second cooling medium, substantially as set forth.

3. In a cooler or condenser, a plurality of cooling fluid conduits, means for connecting the said conduits together, means for conducting a gas to be cooled successively over these conduits, means for supplying a cooling medium to the last of the said conduits, means for conducting this cooling medium to the first of the said conduits, and means for supplying a second cooling medium to the conduits intermediate the first and last conduits, substantially as set forth.

4. In a cooler or condenser, a conduit for the gas to be cooled, means for subjecting the said gas to a relatively cold fluid near its entrance into the conduit and just before it passes therefrom, and means for subjecting the gas to a second stream of cooling fluid intermediate two portions of the first named cooling fluid, substantially as set forth.

5. A condenser or cooler comprising a plurality of interconnected chambers for the gas to be cooled, a conduit for cooling fluid positioned Within each of the chambers, means for connecting the said conduits together, means for admitting a cooling fluid to the last conduits over which the gas passes before leaving the said chambers, means for conducting fluid from the last named conduits to the conduits over which the gas passes upon entering the chamber, and means for admitting a second stream of cooling medium to the conduits intermediate the first and last conduits, substantially as set forth.

6. A condenser comprising a plurality of interconnected pipes having an inlet and an outlet for conducting fluid into and out of said pipes, a conduit for a cooling medium positioned in each'pipe, means for connecting said conduits together, an inlet forcool ing fluid connected to one end of the final conduit in the condenser, a pipe connecting the other end of this conduit with one end of the initial conduit in the condenser, the other end of the said initial conduit being connected to an outlet for the cooling fluid and the intermediate conduits being connected to a cooling fluid inlet and outlet separate from the inlet and outlet for the first named cooling fluid, substantially as set forth.

In Witness whereof, I have hereunto set my hand at WVaynesboro, Pennsylvania, this 20th day of February, -A. D. nineteen hundred and twenty-eight.

NORMAN M. SMALL; 

